Lip for dredge buckets



i.. G. ATTENBUROUGH AND1. F.NEWSOM.

LiP FOR DREDGE BUCKETS. APP|. |CAT0N man nume. |1920.

maw/@ "L, GyATTENBoRoUGr-z ANDJ. F. NEW/som,

LIP FDR DR'EDGLBUGKETS.' Awucmma man nue'. se, 1920.

'mmm @ou 39 19252.. I SHEETS-SHEET 2 man 2, l

INVENTo-RS.

`iatcnted ct. 3, 1922.

Een?

a... tiene LEONARD G. ATTENBOROUGH, OF IPOH, PERAK, FEDERATED MALAY STATES, AND JOHN F, NEWSOIVI` OF PALO ALTO, CALIFORNIA.

v LIP-FOR DREDGE BUCKETS.

Application led August-16, 1920. Serial No. 403,681.

To all whom t 'may concern.'

Be it known thatV we, LEONARD GEORGE A'rrnNonoUGH, British subject, residing at lpoh, Perak, Federated Malay States, and JOHN FLESHER NnwsoM, citizen ot the United States, residing at Palo Alto, in the county of Santa Clara, State ot' California, have invented a new and usetul Lip tor Dredge Buckets, of which the 'following is a specification in such full and clear terms as will enable those skilled in the art to construct and use the same.

This invention relates to a lip for dredge buckets and its object is to produce a lip which shall be so constructed as to enable the dredge bucket to operate in stiff clay 'soil without having the clay stick in the bucket, and thereby prevent the load from dumping, and also `to facilitate the disintegration of the clayin the subsequent treatment. y

It will be understood by those skilled in the art that when (ligging in stili' clay ground, the clay Will stick to the inside of the dredge bucket, and in a short time it will till ,it up in such manner as to prevent it from obtaining a fresh load each time the bucket passes down against the bank being dug. When this takes place, it is necessary to stop the bucket line and clean the buckets before it is possible to operate the dredge.

vIn this invention the lip is so designed as to prevent the material dug from adhering to the bucket, by deiiectino' the material away from the back of the bucket, which Will leave a sf ace in which water or soft material will collect between the mass ot clay and the back of bucket, thereby facilitating proper dumping. v

Another'object otl the invention is to prevent the mass being dug from being pushed against the inner side ot the back of the bucket so firmly that air or Water cannot get in to allow the-dumping when the bucket goes over the upper tumbler of the bucket ladder. v Another object ot' the invention is to provide means whereby the clay being dug will be broken up into smaller pieces as the bucket digs up its charge, thus further facilitating dumping of the clay from. the buckets. and its subsequent disintegration. *further object of the invention is to break up, the material so that it will pass into the bucket' in a more or lessi4 estimatedl Fig. 3 is a plane view ot the bucket looking at right angles to the plane of its mouth on the line 3 il. Fig. 4, showing a slightly modified form of bucket lip. and

Fig. 4 is a sectional view of the bucket looking at right angles to Fig. 3.

Fig. 5 is a sectional view showing detachable projecting cutting ribs, which may be removed from the bucket lip and replaced.

Fig. 6 is a top view ot 4the detachable cutting rib shown in Fig. 5.

While it will `be understood that the improved lips may be attached to any type ot dredge or elevator bucket. the bucket shown iu Figures 1 and 2 is one especially adapted for and in common use on endless lchain dredge s vstems, but may bev ot' any desired type. lt comprises'the bucket body l, with two heavy lugs 2 and 3 for connecting it to the next adjacent bucket, and it has an eye ft to receive the pin passing through the lugs of the other adjacent bucket.

The front edge ot the bucket is recessed to take a horse-shoe shaped lip 5. Said lip in this invention is provided with a projecting tlange at 6 for connecting it to the bucket. and has a raised portion or shoulder at 8 higher than the back of the bucket. to prevent the material being scooped up from passing d1- rectly against the back of the bucket. Since the bucket is ordinarily worked under water, it will always mean that there is a body of water between the mass being dug and the back of the bucket. i

In order to break up the clay, the bucket lip may have a plurality ot' fixed or detachcu'tting the clay into strips as it enters the bucket. v

`InI the form of the invention shown in FigsQS and4 the ordinary dredge bucket is illustrated at 10, lugs for connecting the bucket to the next ad]acent`bucket at 11 and 12, and the bottom eye is indicated at 1 3. The improved lip as shown on this bucket, 14, had a curved portion at 15 similar to .that used in the other form of bucketkbut :the raised portion of the li'p is provlded with a plurality of channels, 16. l

The channels, 16, serve to permit the retention therein, while the digging is taking place, of soft material and Water, and thereby tend to lo'osen the clay from the bucket lip and bottom.

It will be understood that the projecting cutters or ribs as shown at 9, may also be attached to this form of lip.

It will be noted that the curve or angle ,of the lip is such that the material passing thereover'is cut to a diiferent curve or angle from that of the bucket back,lthereby assisting vin preventing the material from being pushed solidly against the bottom of the bucket. v

It will be further noted that the cutting ribs may be cast either as a part -of the bucket lip or may be made detachable, as illustrated in Fig. 5, and that these cutters may alsoxbe provided with an inner project ing vane which willcut the clay into strips as it enters the bucket.

Having now particularly described and ascertained the nature of our said inven- Vtionand in what manner the same isrto be performed we declare that what We claim is as follows, but various modifications may be made in the construction shown in the drawings and above particularly described form, within the purview of our invention.

LA lip for dredge buckets having a flange extending under the bucket, means to secure the'lip to the bucket at theI ends direct material passing thereover into the bucket away from the bottom of the bucket and toward the back of the bucket.

2. A lip for dredge buckets comprising a lip` having an extended cutting face, means at the ends of the lip to secure the same to the bucket, a lla-nge on the lip extending under the bucket, that portion of the lip at the 'edge of the bucket being raised above the bottom of the, bucket and smoothly formed without shoulders to direct material passing into the bucket away from the bottom of the bucket and toward theback of the bucket. l

3. A lip for vd redge buckets comprising a detachable cutting member extended across the mouth of the bucket, means to secure said lip in place, said means comprising bolts at the ends of the lip, and a flange extending therefrom under the bucket bottom., the body of the lip being of different thicknesses in different transverse y.

4. A lip for dredge buckets comprising a detachable member having a plurality o'f pirojecting cutting ribs, a flange extending from the lip under the back of the bucket, said lip being raised immediately adjacent the bucket so that material passing thereover will be directed away from the bottom of the bucket and toward the back of the bucket, said lip-being of gradually increasing thickness from its front portion to the front edge of the bucket and of varying thickness longitudinally. A i

In testimony whereof we have hereunto set our hands this 14th day of April, A. D.-

L. G; ATTENBOROUGH. J. 11 .NEWSOM wie,

ortions both longitudinally and A 

